diff --git a/app/src/file_handler.c b/app/src/file_handler.c
index e9d5e02b..c4366691 100644
--- a/app/src/file_handler.c
+++ b/app/src/file_handler.c
@@ -121,7 +121,7 @@ file_handler_destroy(struct file_handler *file_handler) {
     SDL_DestroyCond(file_handler->event_cond);
     SDL_DestroyMutex(file_handler->mutex);
     request_queue_destroy(&file_handler->queue);
-    SDL_free((void *) file_handler->serial);
+    SDL_free(file_handler->serial);
 }
 
 static process_t
diff --git a/app/src/file_handler.h b/app/src/file_handler.h
index 111161dc..5d50289d 100644
--- a/app/src/file_handler.h
+++ b/app/src/file_handler.h
@@ -21,7 +21,7 @@ struct request_queue {
 };
 
 struct file_handler {
-    const char *serial;
+    char *serial;
     SDL_Thread *thread;
     SDL_mutex *mutex;
     SDL_cond *event_cond;